275726661 has 8 divisors (see below), whose sum is σ = 420154944. Its totient is φ = 157558080.

The previous prime is 275726657. The next prime is 275726663. The reversal of 275726661 is 166627572.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 275726661 - 2² = 275726657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275726663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6564900 + ... + 6564941.

It is an arithmetic number, because the mean of its divisors is an integer number (52519368).

Almost surely, 2^275726661 is an apocalyptic number.

275726661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

275726661 is a deficient number, since it is larger than the sum of its proper divisors (144428283).

275726661 is a wasteful number, since it uses less digits than its factorization.

275726661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13129851.

The product of its digits is 211680, while the sum is 42.

The square root of 275726661 is about 16605.0191508471. The cubic root of 275726661 is about 650.8680009200.

The spelling of 275726661 in words is "two hundred seventy-five million, seven hundred twenty-six thousand, six hundred sixty-one".